Carbureter.



A. L. PAYTON.

CARBURETER. APPLICATION FILED JAN. 19, 1,916.

LMLMK Patented 00. 2,1917.

1061 71257 J/Z zu/Pl P ZEZ/ urn w y n U n? i Girl,

Specification of Letters E's-tent.

Patented fillet. with.

Application filed January it, 93.55. Serial He. 72.9%.

To all whom it may concern:

Be it known that I. ARTHUR L. Rir'roia citizen of the United States, residing at Chicago, in the county of Cool; and State of Illinois have invented a certain new and useful Improvement in Carbureters, of which the following is a full, clear concise, and exact description, referenceheing had to the arnompanying drawings, forming a part of this specification.

' lily invention relates to carbureters for internal combustion engines and has for its object the provision of simple and eilective means for supplying fuel to the fuel or float chamber of the carbureter from a fuel reservoir located at a point below the float chamber of the carbureter.

The object of my invention is to utilize the suction or vacuum created in the atomizi-ng chamber of the carbureter for providing and maintaining a difference of pressure between the supply reservoir and the lioat chamber. The float chamber of the car oureter is arranged to communicateby means of a conduit with the fuel reservoir. The fuel reservoir is provided with a vent so that the fuel contained therein is subjected to atmospheric pressure, which. when the float chamber contains a pressure which is less than the atmosphere, serves to transport the fuel from the fuel reservoir to the float chamber of the carhureter. A su' able valve mechanism is employed within float chamber so that the transportation oi incl from the supply reservoir to the carbureter does not take place unless the level oi? the fuel within the float chamber falls below predetermined height.

To provide the vacuum or reduction of pressure within the floatchamber of the carbur wrn 'de an opcni comin'iniicating chamber at Jlll'l) abovethe j the operation of tie .o with which the carburetor is associated My invention consists in the l and homhination cit parts and ins ties, set forth in the following detail description and claimed in the appended claim...

lily invention will he more clearly under-- stood by referring to the accompanying drawing which illustrates diagrammatically a carburcter and a fuel reservoir located at a point below the normal fuel level Within the l'uel chamber of the carbureter.

.l. e carhureter is illustrated at 1, providedwith the usual flanges 2 to facilitate connecticn between the carbureter and the intake manifold of the internal combustion engine. The carburetor contains the usual atomizing chamber 5 into which extends the fuel nozzle 6 terminating at its lower end in the fuel or tloat chamber 7. The nozzle 6 may, if desired, extend through the float 8 to form a guide therefor and may have a manuall operated valve 9 for controlling the fuel passageway therein. Pivoted at 10 is a lever 11, resting upon the upper face of the float 8. This lever is provided with a valve memher 1:: rranged to open and close when the float is moved up and down, an opening 13 communicating with the conduit 14. The conduit is extends downwardly into the supply reservoir 15, the lower end of the conduit being por itioned adjacent the bottom of the reservoir. 18 illustrates a vent provided in the reservoir and serves to permit the r'uel contained therein to be subjected to atmospheric pressure.

17 illustrates the throttle valve which is under the control of the. operator and serves enable the operator to control the supply of tool to internal combustion engine.

Located in the intake port 18 of the carburetor is a valve 19 normally held against its seat 20 b T means of a compression spring 21. This spring 21 is interposed between the valve 19 and spider E22 supported from the casing. The float chamber 7 has communication with the intake port through an opening A second valve isprovided at 24, which is disposed between the opening 23 and that portion of the atomizing chamber into which the nozzle 6 extends. This valve normally r'ltllLl against its seat 243 by means of a compressionspring 26 extending between the valve and a spider 27 carried by the casing. The compression spring 26 serves the function of providing a difi'erence in pressure between that portion of the atorhizing chamber 5 which is immediately adjacen the nozzle 6 and the interior of the float member 7. The spring 21 which is "led on the outside of theopening 23 is to control or dcterminh the amount created by the engine.

of pressure reduction which is obtained within the float chamber, due to "the suction The operation of the device just described is as follows:

As the internal combustion engine is operated a vacuum or partial vacuum is' produced in the atomizing chamber 5, and after a certain-predetermined reduction of pressure is produced in this chamber, the valve 24 will be opened against the tension of the spring 26. The opening of this valve will. subject the chamber 28 to thesuction pro-- of diiferende between the pressures of the atomizing chamber 5 and the fuel chamber 7. I have found that a one pound pressure reduction in the chamber 28 is suiiicient to raise the fuel for a distance of about thirty inches, which is sufiicient for most purposes where the carbureter is used in connection with automobiles. When, therefore, it is de sired to operate the system on a one pound pressure reduction, the valve 19 is arranged so that it will open the intake port of the carbulreter when a one pound pressure reduc tion is obtained Within the chamber 28.

fuel chamber.

When during the operation of the carbureter the fuel level within the float chamber 7 is lowered, the float 8 is accordingly lowered to open the valve 12. The condult 14 then has a free communication between the supply reservoir 15 and the interior of the As soon, therefore, as the valve 12 is opened, the difierence in pressure between the supply reservoir and the fuel chamber will cause the gasolene to be forced upwardly through the conduit 1% into the fuel chamber. When the level within the fuel chamber has again reached its normal height, the float will close the valve 12 and discontinue the flow of fuel through the conduit 14. until the fuel level has again receded. Due to the fact that the conduiul i empties into the float chamber at a point above the fuel level therein, at no time, r gardless of the position of the valve 12, can the supply of fuel in the float chamber return to the reservoir.

' Having thus described my invention, what I claim as new and desire to secure by Let- "ters Patent of the United States, is:

1 A carbureter provided with a passage way therethrough terminating in intake and outlet ports-and a fuel chamber, a fuel nozpassageway, and a second automatic valve normally seated against atmospheric pressure disposed in the passageway between the first mentioned valve and intake port for restricting the passage of air through the carbureter, said valves serving to maintain a substantially constant pressure reduction for the space between them, the portion of the fuel chamber above the normal fuel level therein communicating with the passageway at a point between the two valves.

2. A carbureter provided with apassage way therethrough terminating in intake and outlet ports, and a fuel chamber, a fuel nozzle affording communication between the fuel: chamber andthe passageway, an automatic. valve seating against atmospheric pressure disposed in the passageway between the fuel nozzle and intake port for restricting the passage of air through the carbureter, the valve being arranged, when closed, to entirely' prevent the passage of air through the passageway, a second automatic valve, nor-. mally seating against atmospheric pressure disposed in the passageway between the first mentioned valve and the intake port for restricting the passage of air through the carbureter, said valves serving to maintain asubstantially constant pressure reduction for.

the space between them, the portion of the fuel chamber above the normal fuel level therein communicating with the passageway at a point between the two-valves, a supply reservoir, a conduit connecting the reservoir with the fuel chamber, a valve for controlling the transportation of fuel through the conduit and a float in the fuel chamber for" operating the valve.

'7 3;"Afs1ition feed carbureterprovided with a single air intake, a pair of automatic valves serially situated. in the air intake anterior to the atomizing chamber of the carbureter, and a throttle posterior to said atomizing chamber, a supply reservoir .aijacent the atomizing chamber, a spray nozzle in the atomizing chamber andconductively A connected with the gasolene of the reservoir,

' the upper spaces 01' the reservoir above the gasolene therein being conductively c0nnected with the space between said serially arranged automatic valves, whereby the sue-- tion producing means for the carbureter will maintain a pressure in the reservoir, which is a differential between-the atmos-. pheric pressure and that within the atomizing chamber of the carbureter. 4. A carbureter provided with an'atomizing chamber and a float chamber, a main source of supply below the level of the float chamber, a pair of serially arranged auto matic valves through which all of the air admitted to said atomizing chamber passes, a manually operated throttle posterior to said atomizing chamber, a duct connecting the spaces between said automatic valves with the upper part of the float chamber, a

spray nozzle in the atomizing chamber and aduct connecting said spray nozzle with the lower, part of said float chamber.

5. Acarbureter ot' the suction 5 pic-- vided with an atomizing chamber, a throt posterior to said chamber and a pair of? serially arranged automatic valves anterior to said atomizing chamber, a car i a main source of fuel supply, a con tending from said main source of fuel supply and communicating with the upper part of said fioat chamber, a valve for closing the opening between said conduit and Heat chamber, a float in the float chamber controlling said valve, a spray nozzle in atomizing chamber conductively communicating with the lower part of the float cham her and conduit connecting the upper parts of the float chamber with the space between i said automatic valves.

6. A 'carbureter for suction feed internal combustion engines provided with an atomizing chamber, a air of serially arranged automatic valves anterior to said atomizing chamber and serving as a restriction to the main supply of air to said atomizing chamber, a float chamber having its upper spaces conductively ccnnectedwith the space between said automatic valves, a main supply tank and acenduit connecting toe lower part of said supply tank with the upger part saic. oat chamber, a float in the iioa d a valve controlled by said and closing the port between supply source and. said float cha opening from said snppl com d float chamber be ng were the is"; :ie gasolene in. the float chamber, so that soiene cannot return from the float chamber the main source of sup ply, the coinoination being such that gasolene Will he forced into the float chamber by atmospheric pressure upon the surface of the gasolenc the main supply source.

In Witness whereof, hereunto subscribe my name this 17th day of January, A. I

ARTHUR L. PAYTON;

Witnesses:

MARY A. Coon, HAnain'r BooKHAenN, 

